Chicks comparison between Alectoris chukar and Alectoris rufa species

Chicks born on the 2019, approx. 2 weeks old.
The difference is very significative at the level of the tail, Red-legged partridges (Alectoris rufa) have red feathers on the tail, chukar have grey feathers.
Red-legged partridges chicks also have more brownish head according to me.